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Levers and Pulleys 1

Levers Investigation 1 Parts 1-3

a simple machine that people use to gain a mechanical advantage, such as making work easier.

lever arm

a stick or beam free to pivot at a point

fulcrum

the point where the lever arm pivots

load

the mass lifted or the resistance overcome by a lever

effort

the force needed to move a load or overcome a resistance

Effort is measured in __________.

Newtons (N)

In what ways can a lever provide an advantage?
A lever can make a load _________ to lift, it can move loads ,and it ________ the effort.

easier, reduces

What is the relationship between the load and effort that gives a lever user the greater advantage?
In a lever system the farther from the ________ the effort is applied, the ______ the advantage is to the lever user.

fulcrum,easier

Two-coordinate graphs

show relationships between two variables and can be used to make predictions

Advantage

is a benefit obtained by using a lever (or other simple machine.)

When the load is at a constant position on the lever arm, how can you make it easier to lift the load?

The farther the effort is from the fulcrum, the easier it is to lift the load.

What is the difference between the weight of the load and the amount of effort needed to lift it?

The weight of the load remains the same , but the effort needed to lift it varies depending on where the effort is applied on the lever arm.

When using the spring scale to measure effort needed with the lever, you must add ________ to your reading,because the _________ of the spring scale is already exerting 0.5 newtons on the lever.

0.5N, weight:

What is the relationship between the location of the load on the lever system and the effort it takes to move it?

The effort needed to lift the load decreases as the load gets closer to the fulcrum; the effort increases as the load gets farther from the fulcrum.